The clitellum of Pheretima posthuma is primar | vedclass

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(C) The clitellum is a prominent glandular and non-segmented section of the body wall in earthworms,typically found in segments $14-16$. Its primary f

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Cocoon formation

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(C) The clitellum is a prominent glandular and non-segmented section of the body wall in earthworms,typically found in segments $14-16$. Its primary function is the secretion of mucus and albumin,which are essential for the formation of a cocoon. During the reproductive process,the clitellum secretes a mucous tube that hardens to form a cocoon,within which fertilization and development of the embryos occur.

Column-$I$	Column-$II$
$1$. Spermathecae	$a$. $6^{th}$ to $9^{th}$ segments
$2$. Typhlosole	$b$. $1^{st}$ to $3^{rd}$ segments
$3$. Buccal cavity	$c$. $26^{th}$ to $35^{th}$ segments in intestine
$4$. Pharyngeal nephridia	$d$. $4^{th}$ to $6^{th}$ segment

The clitellum of $Pheretima$ $posthuma$ is primarily associated with which of the following?

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